1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Platform level USB initialization for FS USB OTG controller on omap1
5 * Copyright (C) 2004 Texas Instruments, Inc.
8 #include <linux/module.h>
9 #include <linux/kernel.h>
10 #include <linux/init.h>
11 #include <linux/platform_device.h>
12 #include <linux/dma-map-ops.h>
14 #include <linux/delay.h>
15 #include <linux/soc/ti/omap1-io.h>
24 /* These routines should handle the standard chip-specific modes
25 * for usb0/1/2 ports, covering basic mux and transceiver setup.
27 * Some board-*.c files will need to set up additional mux options,
28 * like for suspend handling, vbus sensing, GPIOs, and the D+ pullup.
32 * - 1611B H2 (with usb1 mini-AB) using standard Mini-B or OTG cables
33 * - 5912 OSK OHCI (with usb0 standard-A), standard A-to-B cables
34 * - 5912 OSK UDC, with *nonstandard* A-to-A cable
35 * - 1510 Innovator UDC with bundled usb0 cable
36 * - 1510 Innovator OHCI with bundled usb1/usb2 cable
37 * - 1510 Innovator OHCI with custom usb0 cable, feeding 5V VBUS
38 * - 1710 custom development board using alternate pin group
39 * - 1710 H3 (with usb1 mini-AB) using standard Mini-B or OTG cables
42 #define INT_USB_IRQ_GEN IH2_BASE + 20
43 #define INT_USB_IRQ_NISO IH2_BASE + 30
44 #define INT_USB_IRQ_ISO IH2_BASE + 29
45 #define INT_USB_IRQ_HGEN INT_USB_HHC_1
46 #define INT_USB_IRQ_OTG IH2_BASE + 8
48 #ifdef CONFIG_ARCH_OMAP_OTG
51 omap_otg_init(struct omap_usb_config
*config
)
57 /* NOTE: no bus or clock setup (yet?) */
59 syscon
= omap_readl(OTG_SYSCON_1
) & 0xffff;
60 if (!(syscon
& OTG_RESET_DONE
))
61 pr_debug("USB resets not complete?\n");
63 //omap_writew(0, OTG_IRQ_EN);
65 /* pin muxing and transceiver pinouts */
66 if (config
->pins
[0] > 2) /* alt pingroup 2 */
68 syscon
|= config
->usb0_init(config
->pins
[0], is_usb0_device(config
));
69 syscon
|= config
->usb1_init(config
->pins
[1]);
70 syscon
|= config
->usb2_init(config
->pins
[2], alt_pingroup
);
71 pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1
));
72 omap_writel(syscon
, OTG_SYSCON_1
);
74 syscon
= config
->hmc_mode
;
75 syscon
|= USBX_SYNCHRO
| (4 << 16) /* B_ASE0_BRST */;
80 pr_debug("USB_TRANSCEIVER_CTRL = %03x\n",
81 omap_readl(USB_TRANSCEIVER_CTRL
));
82 pr_debug("OTG_SYSCON_2 = %08x\n", omap_readl(OTG_SYSCON_2
));
83 omap_writel(syscon
, OTG_SYSCON_2
);
85 printk("USB: hmc %d", config
->hmc_mode
);
87 pr_cont(", usb2 alt %d wires", config
->pins
[2]);
88 else if (config
->pins
[0])
89 pr_cont(", usb0 %d wires%s", config
->pins
[0],
90 is_usb0_device(config
) ? " (dev)" : "");
92 pr_cont(", usb1 %d wires", config
->pins
[1]);
93 if (!alt_pingroup
&& config
->pins
[2])
94 pr_cont(", usb2 %d wires", config
->pins
[2]);
96 pr_cont(", Mini-AB on usb%d", config
->otg
- 1);
99 /* leave USB clocks/controllers off until needed */
100 w
= omap_readw(ULPD_SOFT_REQ
);
101 w
&= ~SOFT_USB_CLK_REQ
;
102 omap_writew(w
, ULPD_SOFT_REQ
);
104 w
= omap_readw(ULPD_CLOCK_CTRL
);
106 w
|= DIS_USB_PVCI_CLK
;
107 omap_writew(w
, ULPD_CLOCK_CTRL
);
109 syscon
= omap_readl(OTG_SYSCON_1
);
110 syscon
|= HST_IDLE_EN
|DEV_IDLE_EN
|OTG_IDLE_EN
;
112 #if IS_ENABLED(CONFIG_USB_OMAP)
113 if (config
->otg
|| config
->register_dev
) {
114 struct platform_device
*udc_device
= config
->udc_device
;
117 syscon
&= ~DEV_IDLE_EN
;
118 udc_device
->dev
.platform_data
= config
;
119 status
= platform_device_register(udc_device
);
121 pr_debug("can't register UDC device, %d\n", status
);
125 #if IS_ENABLED(CONFIG_USB_OHCI_HCD)
126 if (config
->otg
|| config
->register_host
) {
127 struct platform_device
*ohci_device
= config
->ohci_device
;
130 syscon
&= ~HST_IDLE_EN
;
131 ohci_device
->dev
.platform_data
= config
;
132 status
= platform_device_register(ohci_device
);
134 pr_debug("can't register OHCI device, %d\n", status
);
138 #ifdef CONFIG_USB_OTG
140 struct platform_device
*otg_device
= config
->otg_device
;
143 syscon
&= ~OTG_IDLE_EN
;
144 otg_device
->dev
.platform_data
= config
;
145 status
= platform_device_register(otg_device
);
147 pr_debug("can't register OTG device, %d\n", status
);
150 pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1
));
151 omap_writel(syscon
, OTG_SYSCON_1
);
155 static void omap_otg_init(struct omap_usb_config
*config
) {}
158 #if IS_ENABLED(CONFIG_USB_OMAP)
160 static struct resource udc_resources
[] = {
161 /* order is significant! */
164 .end
= UDC_BASE
+ 0xff,
165 .flags
= IORESOURCE_MEM
,
166 }, { /* general IRQ */
167 .start
= INT_USB_IRQ_GEN
,
168 .flags
= IORESOURCE_IRQ
,
170 .start
= INT_USB_IRQ_NISO
,
171 .flags
= IORESOURCE_IRQ
,
173 .start
= INT_USB_IRQ_ISO
,
174 .flags
= IORESOURCE_IRQ
,
178 static u64 udc_dmamask
= ~(u32
)0;
180 static struct platform_device udc_device
= {
184 .dma_mask
= &udc_dmamask
,
185 .coherent_dma_mask
= 0xffffffff,
187 .num_resources
= ARRAY_SIZE(udc_resources
),
188 .resource
= udc_resources
,
191 static inline void udc_device_init(struct omap_usb_config
*pdata
)
193 pdata
->udc_device
= &udc_device
;
198 static inline void udc_device_init(struct omap_usb_config
*pdata
)
204 /* The dmamask must be set for OHCI to work */
205 static u64 ohci_dmamask
= ~(u32
)0;
207 static struct resource ohci_resources
[] = {
209 .start
= OMAP_OHCI_BASE
,
210 .end
= OMAP_OHCI_BASE
+ 0xff,
211 .flags
= IORESOURCE_MEM
,
214 .start
= INT_USB_IRQ_HGEN
,
215 .flags
= IORESOURCE_IRQ
,
219 static struct platform_device ohci_device
= {
223 .dma_mask
= &ohci_dmamask
,
224 .coherent_dma_mask
= 0xffffffff,
226 .num_resources
= ARRAY_SIZE(ohci_resources
),
227 .resource
= ohci_resources
,
230 static inline void ohci_device_init(struct omap_usb_config
*pdata
)
232 if (!IS_ENABLED(CONFIG_USB_OHCI_HCD
))
235 pdata
->ohci_device
= &ohci_device
;
236 pdata
->ocpi_enable
= &ocpi_enable
;
239 #if defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG)
241 static struct resource otg_resources
[] = {
242 /* order is significant! */
245 .end
= OTG_BASE
+ 0xff,
246 .flags
= IORESOURCE_MEM
,
248 .start
= INT_USB_IRQ_OTG
,
249 .flags
= IORESOURCE_IRQ
,
253 static struct platform_device otg_device
= {
256 .num_resources
= ARRAY_SIZE(otg_resources
),
257 .resource
= otg_resources
,
260 static inline void otg_device_init(struct omap_usb_config
*pdata
)
262 pdata
->otg_device
= &otg_device
;
267 static inline void otg_device_init(struct omap_usb_config
*pdata
)
273 static u32 __init
omap1_usb0_init(unsigned nwires
, unsigned is_device
)
278 if (!cpu_is_omap15xx()) {
282 l
= omap_readl(USB_TRANSCEIVER_CTRL
);
284 omap_writel(l
, USB_TRANSCEIVER_CTRL
);
290 omap_cfg_reg(W4_USB_PUEN
);
296 // omap_cfg_reg(P9_USB_DP);
297 // omap_cfg_reg(R8_USB_DM);
299 if (cpu_is_omap15xx()) {
300 /* This works on 1510-Innovator */
305 * - peripheral should configure VBUS detection!
306 * - only peripherals may use the internal D+/D- pulldowns
307 * - OTG support on this port not yet written
310 l
= omap_readl(USB_TRANSCEIVER_CTRL
);
314 omap_writel(l
, USB_TRANSCEIVER_CTRL
);
319 /* alternate pin config, external transceiver */
320 if (cpu_is_omap15xx()) {
321 printk(KERN_ERR
"no usb0 alt pin config on 15xx\n");
325 omap_cfg_reg(V6_USB0_TXD
);
326 omap_cfg_reg(W9_USB0_TXEN
);
327 omap_cfg_reg(W5_USB0_SE0
);
329 omap_cfg_reg(Y5_USB0_RCV
);
331 /* NOTE: SPEED and SUSP aren't configured here. OTG hosts
332 * may be able to use I2C requests to set those bits along
333 * with VBUS switching and overcurrent detection.
339 l
= omap_readl(USB_TRANSCEIVER_CTRL
);
340 l
&= ~CONF_USB2_UNI_R
;
341 omap_writel(l
, USB_TRANSCEIVER_CTRL
);
356 omap_cfg_reg(AA9_USB0_VP
);
357 omap_cfg_reg(R9_USB0_VM
);
358 l
= omap_readl(USB_TRANSCEIVER_CTRL
);
359 l
|= CONF_USB2_UNI_R
;
360 omap_writel(l
, USB_TRANSCEIVER_CTRL
);
364 printk(KERN_ERR
"illegal usb%d %d-wire transceiver\n",
368 return syscon1
<< 16;
371 static u32 __init
omap1_usb1_init(unsigned nwires
)
375 if (!cpu_is_omap15xx() && nwires
!= 6) {
378 l
= omap_readl(USB_TRANSCEIVER_CTRL
);
379 l
&= ~CONF_USB1_UNI_R
;
380 omap_writel(l
, USB_TRANSCEIVER_CTRL
);
385 /* external transceiver */
386 omap_cfg_reg(USB1_TXD
);
387 omap_cfg_reg(USB1_TXEN
);
389 omap_cfg_reg(USB1_RCV
);
391 if (cpu_is_omap15xx()) {
392 omap_cfg_reg(USB1_SEO
);
393 omap_cfg_reg(USB1_SPEED
);
395 } else if (cpu_is_omap1610() || cpu_is_omap5912()) {
396 omap_cfg_reg(W13_1610_USB1_SE0
);
397 omap_cfg_reg(R13_1610_USB1_SPEED
);
399 } else if (cpu_is_omap1710()) {
400 omap_cfg_reg(R13_1710_USB1_SE0
);
403 pr_debug("usb%d cpu unrecognized\n", 1);
418 omap_cfg_reg(USB1_VP
);
419 omap_cfg_reg(USB1_VM
);
420 if (!cpu_is_omap15xx()) {
423 l
= omap_readl(USB_TRANSCEIVER_CTRL
);
424 l
|= CONF_USB1_UNI_R
;
425 omap_writel(l
, USB_TRANSCEIVER_CTRL
);
430 printk(KERN_ERR
"illegal usb%d %d-wire transceiver\n",
434 return syscon1
<< 20;
437 static u32 __init
omap1_usb2_init(unsigned nwires
, unsigned alt_pingroup
)
441 /* NOTE omap1 erratum: must leave USB2_UNI_R set if usb0 in use */
442 if (alt_pingroup
|| nwires
== 0)
445 if (!cpu_is_omap15xx() && nwires
!= 6) {
448 l
= omap_readl(USB_TRANSCEIVER_CTRL
);
449 l
&= ~CONF_USB2_UNI_R
;
450 omap_writel(l
, USB_TRANSCEIVER_CTRL
);
453 /* external transceiver */
454 if (cpu_is_omap15xx()) {
455 omap_cfg_reg(USB2_TXD
);
456 omap_cfg_reg(USB2_TXEN
);
457 omap_cfg_reg(USB2_SEO
);
459 omap_cfg_reg(USB2_RCV
);
460 /* there is no USB2_SPEED */
461 } else if (cpu_is_omap16xx()) {
462 omap_cfg_reg(V6_USB2_TXD
);
463 omap_cfg_reg(W9_USB2_TXEN
);
464 omap_cfg_reg(W5_USB2_SE0
);
466 omap_cfg_reg(Y5_USB2_RCV
);
467 // FIXME omap_cfg_reg(USB2_SPEED);
469 pr_debug("usb%d cpu unrecognized\n", 1);
473 // omap_cfg_reg(USB2_SUSP);
488 if (cpu_is_omap15xx()) {
489 omap_cfg_reg(USB2_VP
);
490 omap_cfg_reg(USB2_VM
);
494 omap_cfg_reg(AA9_USB2_VP
);
495 omap_cfg_reg(R9_USB2_VM
);
496 l
= omap_readl(USB_TRANSCEIVER_CTRL
);
497 l
|= CONF_USB2_UNI_R
;
498 omap_writel(l
, USB_TRANSCEIVER_CTRL
);
503 printk(KERN_ERR
"illegal usb%d %d-wire transceiver\n",
507 return syscon1
<< 24;
510 #ifdef CONFIG_ARCH_OMAP15XX
511 /* OMAP-1510 OHCI has its own MMU for DMA */
512 #define OMAP1510_LB_MEMSIZE 32 /* Should be same as SDRAM size */
513 #define OMAP1510_LB_CLOCK_DIV 0xfffec10c
514 #define OMAP1510_LB_MMU_CTL 0xfffec208
515 #define OMAP1510_LB_MMU_LCK 0xfffec224
516 #define OMAP1510_LB_MMU_LD_TLB 0xfffec228
517 #define OMAP1510_LB_MMU_CAM_H 0xfffec22c
518 #define OMAP1510_LB_MMU_CAM_L 0xfffec230
519 #define OMAP1510_LB_MMU_RAM_H 0xfffec234
520 #define OMAP1510_LB_MMU_RAM_L 0xfffec238
523 * Bus address is physical address, except for OMAP-1510 Local Bus.
524 * OMAP-1510 bus address is translated into a Local Bus address if the
525 * OMAP bus type is lbus.
527 #define OMAP1510_LB_OFFSET UL(0x30000000)
530 * OMAP-1510 specific Local Bus clock on/off
532 static int omap_1510_local_bus_power(int on
)
535 omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL
);
538 omap_writel(0, OMAP1510_LB_MMU_CTL
);
545 * OMAP-1510 specific Local Bus initialization
546 * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
547 * See also arch/mach-omap/memory.h for __virt_to_dma() and
548 * __dma_to_virt() which need to match with the physical
549 * Local Bus address below.
551 static int omap_1510_local_bus_init(void)
554 unsigned long lbaddr
, physaddr
;
556 omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV
) & 0xfffffff8) | 0x4,
557 OMAP1510_LB_CLOCK_DIV
);
559 /* Configure the Local Bus MMU table */
560 for (tlb
= 0; tlb
< OMAP1510_LB_MEMSIZE
; tlb
++) {
561 lbaddr
= tlb
* 0x00100000 + OMAP1510_LB_OFFSET
;
562 physaddr
= tlb
* 0x00100000 + PHYS_OFFSET
;
563 omap_writel((lbaddr
& 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H
);
564 omap_writel(((lbaddr
& 0x003ffc00) >> 6) | 0xc,
565 OMAP1510_LB_MMU_CAM_L
);
566 omap_writel(physaddr
>> 16, OMAP1510_LB_MMU_RAM_H
);
567 omap_writel((physaddr
& 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L
);
568 omap_writel(tlb
<< 4, OMAP1510_LB_MMU_LCK
);
569 omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB
);
572 /* Enable the walking table */
573 omap_writel(omap_readl(OMAP1510_LB_MMU_CTL
) | (1 << 3), OMAP1510_LB_MMU_CTL
);
579 static void omap_1510_local_bus_reset(void)
581 omap_1510_local_bus_power(1);
582 omap_1510_local_bus_init();
586 #define DPLL_IOB (1 << 13)
587 #define DPLL_PLL_ENABLE (1 << 4)
588 #define DPLL_LOCK (1 << 0)
591 #define APLL_NDPLL_SWITCH (1 << 0)
593 static void __init
omap_1510_usb_init(struct omap_usb_config
*config
)
598 config
->usb0_init(config
->pins
[0], is_usb0_device(config
));
599 config
->usb1_init(config
->pins
[1]);
600 config
->usb2_init(config
->pins
[2], 0);
602 val
= omap_readl(MOD_CONF_CTRL_0
) & ~(0x3f << 1);
603 val
|= (config
->hmc_mode
<< 1);
604 omap_writel(val
, MOD_CONF_CTRL_0
);
606 printk("USB: hmc %d", config
->hmc_mode
);
608 pr_cont(", usb0 %d wires%s", config
->pins
[0],
609 is_usb0_device(config
) ? " (dev)" : "");
611 pr_cont(", usb1 %d wires", config
->pins
[1]);
613 pr_cont(", usb2 %d wires", config
->pins
[2]);
616 /* use DPLL for 48 MHz function clock */
617 pr_debug("APLL %04x DPLL %04x REQ %04x\n", omap_readw(ULPD_APLL_CTRL
),
618 omap_readw(ULPD_DPLL_CTRL
), omap_readw(ULPD_SOFT_REQ
));
620 w
= omap_readw(ULPD_APLL_CTRL
);
621 w
&= ~APLL_NDPLL_SWITCH
;
622 omap_writew(w
, ULPD_APLL_CTRL
);
624 w
= omap_readw(ULPD_DPLL_CTRL
);
625 w
|= DPLL_IOB
| DPLL_PLL_ENABLE
;
626 omap_writew(w
, ULPD_DPLL_CTRL
);
628 w
= omap_readw(ULPD_SOFT_REQ
);
629 w
|= SOFT_UDC_REQ
| SOFT_DPLL_REQ
;
630 omap_writew(w
, ULPD_SOFT_REQ
);
632 while (!(omap_readw(ULPD_DPLL_CTRL
) & DPLL_LOCK
))
635 #if IS_ENABLED(CONFIG_USB_OMAP)
636 if (config
->register_dev
) {
639 udc_device
.dev
.platform_data
= config
;
640 status
= platform_device_register(&udc_device
);
642 pr_debug("can't register UDC device, %d\n", status
);
643 /* udc driver gates 48MHz by D+ pullup */
647 if (IS_ENABLED(CONFIG_USB_OHCI_HCD
) && config
->register_host
) {
650 ohci_device
.dev
.platform_data
= config
;
651 dma_direct_set_offset(&ohci_device
.dev
, PHYS_OFFSET
,
652 OMAP1510_LB_OFFSET
, (u64
)-1);
653 status
= platform_device_register(&ohci_device
);
655 pr_debug("can't register OHCI device, %d\n", status
);
656 /* hcd explicitly gates 48MHz */
658 config
->lb_reset
= omap_1510_local_bus_reset
;
663 static inline void omap_1510_usb_init(struct omap_usb_config
*config
) {}
666 void __init
omap1_usb_init(struct omap_usb_config
*_pdata
)
668 struct omap_usb_config
*pdata
;
670 pdata
= kmemdup(_pdata
, sizeof(*pdata
), GFP_KERNEL
);
674 pdata
->usb0_init
= omap1_usb0_init
;
675 pdata
->usb1_init
= omap1_usb1_init
;
676 pdata
->usb2_init
= omap1_usb2_init
;
677 udc_device_init(pdata
);
678 ohci_device_init(pdata
);
679 otg_device_init(pdata
);
681 if (cpu_is_omap16xx())
682 omap_otg_init(pdata
);
683 else if (cpu_is_omap15xx())
684 omap_1510_usb_init(pdata
);
686 printk(KERN_ERR
"USB: No init for your chip yet\n");